Module 4 · Colors You Can Defend

See it before you marry it

Colours that look great as five tidy columns can fall apart the moment there’s text on them. This lesson is the honest mirror: you’ll see your exacthexes on a real page, check they’re actually readable, and get a feel for the vibe — before you commit.

Realtime Colors: your exact hexes on a real page

Go to realtimecolors.com. It’s 100% free (the pricing page is a tongue-in-cheek “$0.00/mo”), and it drops your palette onto a live one-page website mockup instantly. Because it uses your real hex values — not repainted pixels — this is the truth, in context.

1. Open realtimecolors.com. A sample site appears with default colours.
2. Find the colour controls (the swatches at the bottom / in the panel). Click each one and paste in an exact hex from your Coolors export — text, background, primary, accent.
3. Watch the whole page recolour live. This is your palette doing its actual job: headings, body text, a button, backgrounds.
4. Use the built-in contrast check. If it warns you that your text-on-background is hard to read, believe it — readable text is non-negotiable, and it’s the mistake beginners make most.

AI mockups: for vibe, not for measuring

Realtime Colors shows you the truth. AI mockups show you the vibe — how your palette feels with a photo, an icon, a real headline. Both are useful; they just answer different questions. Upload nothing — just describe it:

Create a realistic website hero-section mockup for my brand using ONLY these colors: Primary [#hex], Accent [#hex], Text [#hex], Background [#hex]. Show a headline, a subheading, one call-to-action button, a simple icon or two, and a placeholder photo area — so I can see how the palette feels with text, icons, and photography together. Clean, modern, flat. Use the accent color for the button.

Then spin it onto other surfaces, one at a time, to pressure-test the feeling:

• “…now show the same palette as a business-card / brand-display mockup.”
• “…as a social-media post template.”
• “…with a photograph in the hero so I can see the palette against real imagery.”

See your logo in the wild

Want the fun part? No new tool required — it’s just a prompt. Attach your logo and ask the AI to stage it in the real world:

Show my logo and these colors on a storefront sign, a t-shirt, and a phone app icon so I can see how they'd look in the real world.

It won’t be pixel-accurate, but it’s a genuinely useful gut-check: does the brand hold up on a sign at a distance? On fabric? Squished into an app icon?

Watch this step

This is Realtime Colors explained by the person who built it — the clearest tour of applying your real hexes to a live page and reading the contrast check. It’s from an independent creator — credited below, so go give them a follow.